an:06374792
Zbl 1301.81342
Gillioz, Marc; von Manteuffel, Andreas; Schwaller, Pedro; Wyler, Daniel
The little skyrmion: new dark matter for little Higgs models
EN
J. High Energy Phys. 2011, No. 3, Paper No. 048, 28 p. (2011).
00338813
2011
j
81V22 35C08 14D21 14F35 83F05
solitons monopoles and instantons; technicolor and composite models
Summary: We study skyrmions in the littlest Higgs model and discuss their possible role as dark matter candidates. Stable massive skyrmions can exist in the littlest Higgs model also in absence of an exact parity symmetry, since they carry a conserved topological charge due to the non-trivial third homotopy group of the \(\mathrm{SU}(5)/\mathrm{SO}(5)\) coset. We find a spherically symmetric skyrmion solution in this coset. The effects of gauge fields on the skyrmion solutions are analyzed and found to lead to an upper bound on the skyrmion mass. The relic abundance is in agreement with the observed dark matter density for reasonable parameter choices.